Variable-speed gear.



N0. 658,655. Patented Sept. 25, I900. E. LANG.

VARIABLE SPEED GEAR.

(Application filed May 10, 1899.)

(No Model.)

a QV,

more TATES ATENT OFFICE.

ERNST LANG, OF BRUSSELS, BELGIUM.

VARIABLES-FEED GEAR.

SPECIFICATION forming part of Letters Patent No. 658,655, dated September 25, 1906. Application filed May 10, 1899. Serial No. 716,311. (No model.)

To all whom, it may concern:

Be it known that I, ERNST LANG, a subject of the King of Bavaria, and a resident of Brussels, Belgium, have invented a new and Improved Variable-Speed Gear, of which the following is a full, clear, and exact description.

My invention relates to variable speed gears, and particularly to that class of gears in which there is provided an expanding pulley whose diameter may be varied gradually.

The object of my invention is to provide a comparatively-simple construction for the indicated purpose.

The invention will be fully described hereinafter and the features of novelty pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in both the views.

Figure 1 is an axial section of the improved gear; and Fig. 2 is a cross-section thereof, taken on the broken line A B O D of Fig. 1.

a indicates the shaft of the pulley, which has rigidly secured thereto two disks 1), to which are pivoted in eyes I) cranked levers c. The inner portions of the said levers are arranged longitudinally-that is, parallel to the axis of the shaftas indicated at d, and are adapted to receive the driving-belt B. Each lever c has an operating extension 0, which is pivotally connected with a slide-block d, guided in radial grooves of a disk or collar e, which is loosely mounted upon the shaft a. It will therefore be obvious that by turning the disk e relatively to the shaft a the beltengaging portions (1 of the levers 0 will be moved toward or from the axis of the shaft 00. To effect such adjustment, I provide the following means:

To the shaft a is keyed a bracket f, which carries the cylinder. h, in which is adapted to slide a piston h. Any suitable compressed fluid, such as steam or air, may be supplied to the space behind the piston it through a pipe 7:. The piston is connected by a pistonrod to an elbow-lever g, pivoted upon the bracket f. The outer end g of the said lever is connected with a slide *0, mounted to move radially in the disk 6.

x indicates the angle through which the lever 9 may be turned by the piston h.

I prefer to provide the disks 1) with peripheral flanges it upon their inner surface, the edges of the said flanges being spaced approximately at a distance corresponding to the width of the driving-belt B. These flanges It also serve as guards for the levers c.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination of a rotary disk, levers pivoted on said disk and provided with beltengaging devices, and means for turning said levers to move the belt-engaging devices toward or from the axis of the disk, substantially as described.

2. The combination of a rotary disk, levers mounted thereon and provided with axiallyextending belt-engaging devices, and a'ring or disk connecting said levers at a distance from their fulcrum and rotatable relatively to the disk which carries the levers, substantially as described.

3. The combination of arotary disk, levers pivoted thereon and provided with belt-engaging devices, the disk mounted to turn rela tively to the first-named disk, and connected with said levers, a cylinder rigidly connected with the first-mentioned disk and a piston mounted to move in said cylinder and connected with the second-named disk, substantially as described.

at. The combination of rotary disks, and a series of cranked levers pivoted to said disks and provided between the same with belt-engaging portions, and means for turning the said levers on their pivots, substantially as described.

5. The combination of rotary disks, levers pivoted on said disks and provided between the same with belt-engaging portions, flanges projecting inwardly from the disks approximately to the plane of the said belt-engaging portions, and means for tnrnin g the levers on their pivots, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two witnesses.

ERNST LANG.

Witnesses RICHARD SEIDENBERGER, HEINRICH HABERMANN. 

